15mL Culture Tube | Flat Bottom with Screw Cap (Borosilicate Glass)

Optimize your microbiological, tissue culture, and sample storage workflows with the Apex Labs 15mL Flat Bottom Culture Tube with Screw Cap. Precision-manufactured from high-purity Expansion 3.3 Borosilicate Glass, this heavy-duty culture vial features a convenient self-standing flat bottom profile that eliminates the constant need for support racks during liquid handling and preparation. Equipped with a heavy-duty, leak-proof threaded screw cap (with an inert liner), it ensures a reliable seal to protect volatile media, prevent sample evaporation, and guard against contamination. Built for high thermal endurance and chemical inertness, this 15 mL culture tube is fully autoclavable and ideal for incubation, chemical reactions, and long-term diagnostic sample preservation.

Product Specification & Direct Ordering

Technical Specifications

• Nominal Capacity: 15 mL
• Glass Material: 3.3 High-Expansion Borosilicate Glass
• Bottom Profile: Self-Standing Flat Bottom Design
• Closure Type: Autoclavable Polypropylene Screw Cap with Inert Liner
• Thermal Shock Resistance: High Resistance (ΔT = 120°C)
• Chemical Durability: Hydrolytic Class ISO 719 (Class HGA 1) – Acid & Alkali Resistant
• Sterilization Compliance: Fully Autoclavable at 121°C / 15 psi
• Manufacturer / Origin: Apex Labs, Varanasi, Uttar Pradesh

Performance Highlights

• Self-Standing Flat Bottom Base: Enables stable upright positioning on laboratory benches and hoods without needing support racks.
• Premium 3.3 Borosilicate Glass: Exceptional clarity and structural wall thickness ensure resistance to thermal expansion, shock, and mechanical stress.
• Leak-Proof Screw Closure: Precision-molded threaded neck with lined cap creates a tight seal against volatile solvent evaporation and airborne contamination.
• Inert & Chemical Resistant: High resistance to acids, alkalis, organic solvents, and culture media reagents prevents ion leaching into sensitive biological samples.
• Repeatable Steam Autoclavability: Built to withstand repeated autoclave cycles at 121°C without clouding, stress cracking, or cap distortion.

Primary Laboratory Implementations

• Microbiological Culture Growth: Ideal for preparing liquid broth cultures, agar slants, and bacterial/fungal incubations.
• Tissue Culture & Media Preparation: Provides a stable, inert vessel for growth media formulation and cellular sample maintenance.
• Diagnostic & Clinical Storage: Secure containment for blood, serum, urine, and biological fluid samples during transport or short/long-term cold storage.
• Chemical & Analytical Testing: Excellent for sample reaction steps, centrifugation, and general solvent handling in analytical labs.